The principal tides on Earth are caused by *** I thought it is A and B A. the gr
ID: 1328767 • Letter: T
Question
The principal tides on Earth are caused by *** I thought it is A and B
A. the gravitational force of the Sun
B. the gravitational force of the Moon
C. the fact that the Earth is revolving around the Sun
D. waves on the ocean
Precession of the equinoxes is caused by the
A. gravitational pull of Polaris
B. gravitational pull of the Moon
C. gravitational pull of the zodiacal constellations
D. tides
The size of the Moon was first calculated from
A. comparisons of the size of craters and maria on the Moon
B. knowledge of the distance to the Moon and its angular diameter
C. its relationship to the size of the Earth and the Sun
D. its apparent diameter and its speed across the celestial sphere
When viewed from two different places on Earth, which of these objects exhibits the greatest parallax angle against the distant stars?
A. the Moon
B. the Sun
C. Mars
D. Polaris
As the Moon orbits the Earth
A. the same side always faces the Earth
B. the same side always stays in darkness
C. the lit side is the side that always faces the Earth
D.both A and B
Explanation / Answer
1. The principal tides on Earth are caused by gravitational force of Moon, as Moon being closer to Earth exerts greater force on water. It is double of the force exerted by Sun on Earth.
2.Precession of the equinoxes is caused by the gravitational pull of Moon.Earth is not a perfect sphere. Gravitational pull of moon on one side of Earth is greater than the other, causing a net torque.Due to this ttorque, rotational axis of Earth precesses.
3. The size of the Moon was first calculated by its relationship to the size of the Earth and the Sun by Aristarchus.
4.When viewed from two different places on Earth, Moon exhibits the greatest parallax angle against the distant stars as closer objects cause greatest parallax
5. As the Moon orbits the Earth the same side always faces the Earth and the same side always stays in darkness as its period of rotation equals its period oof revolution
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.